Boreal Access

If you're using email software such as Outlook Express, Eudora, Netscape, Thunderbird, etc.:

To delete a block of messages, in the list of messages click on the first message you want to delete.  Then hold down the <Shift> key on your keyboard and click on the last message you want to delete.  All the messages between the first and last one you clicked will be highlighted, and clicking the Delete or Trash button in your Toolbar will delete them all. 

To delete selected messages, click the first message, then hold down the <Ctrl> key on your keyboard as you click on each of the other messages.  Each message you click will be highlighted and clicking the Delete or Trash button in your Toolbar will delete them all.